Engineering topics

Cote, C.

Publications and source records attributed to Cote, C..

4 records

NASA NTRS1994

Global ozone data from the meteor-3/TOMS ultraviolet spectrometer

A new TOMS instrument (Total Ozone Mapping Spectrometer) was launched from the Plesetsk Cosomodrome, Russia on August 15, 1991. The purpose of the joint project between the U.S. and Russia was to continue the long-term record of ozone measurements from Nimbus-7/TOMS (launched in October 1978). Ozone data from the two satellites compare very closely. When the orbital positions were nearly the same, the comparison over the entire globe showed an offset of 2 percent with a standard deviation of 5 percent. Comparisons were made with several ground based M124 and Dobson stations showing good agreement in absolute value and with the day-to-day variations seen by the ground stations.

Herman, J. R.↗

NASA NTRS1988

Monocular electro-optical stereo scanner

MEOSS is a single optics and single spectral band camera. Three CCD's working in pushbroom mode are mounted perpendicular to the flight direction on a common focal plate. Their oblique views of + and - 23 degrees forward and backward, as well as nadir oriented, lead to threefold stereoscopic images. This principle allows a nearly simultaneous generation of all three images of a stereo triplet. The time gap between the forward and aft looking images guarantees constant illumination conditions. The ground resolution of MEOSS will be 52 by 80 m ground pixel size, height resolution of 55 m and swath width of 255 km. The drifting ground coverage pattern of MEOSS is unique compared to polar orbiting satellites and will allow images of an area to be taken at different times of the day. A scene will consist of 3144 scan lines, with each having 3236 pixels. The data will be received by the Deep Space Network of JPL Goldstone and mailed to Goddard.

Vermillion, C.↗

NASA NTRS1983

Satellite data relay and platform locating in oceanography. Report of the In Situ Ocean Science Working Group

The present and future use of satellites to locate offshore platforms and relay data from in situ sensors to shore was examined. A system of the ARGOS type will satisfy the increasing demand for oceanographic information through data relay and platform location. The improved ship navigation provided by the Global Positioning System (GPS) will allow direct observation of currents from underway ships. Ocean systems are described and demand estimates on satellite systems are determined. The capabilities of the ARGOS system is assessed, including anticipated demand in the next decade.

Chase, R.↗

NASA NTRS1973

GRAN experiment

A global system for search and rescue was studied to reduce the time lost between a mishap and rescue efforts. The sequence of the GRAN concept proceeds as follows: (1) A distress call is initiated by a survivor and consists of the retransmission of Omega tones and a unique identifying code. (2) Signals are frequency translated through the satellite from UHF to SHF. (3) The received signals are processed in real-time using improved skywave correction and lane ambiguity techniques. The results are processed in geographical coordinates, time of day, and unique ID. This information is then relayed to the closest rescue agent. The Omega system is described, and the satellite/GRAN compatibility is discussed. The program plan and schedule are included.

Morakis, J. C.↗